Improvement in sewing-machines



C. RAYMOND.

Sewing Machine. Y No. 32,925. l Patented July 30.1861.-

N. PETERS. Pnuw-Lilhugnpher. wnhingianjrc.

UNITED STATES PATENT OFFICE.

CHARLES RAYMOND, OF BRATTLEBOROUGH, VERMONT.

IMPROVEMENT IN SEWING-MACHINES..

Specification forming part of Letters Patent No. 32,925, dated July 30,1861.

To all whom it may concern:

Be it known that I, CHARLES RAYMOND, of Brattleborough, in the county ofWindham and State of Vermont, have invented a new and useful Improvementin Sewing-Machines; and l do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming part of this specification, in which-Figures l and 2 are elevations at right angies to each other, and bothpartly in section,

Y of a sewing-machine with my improvements.

Fig. 3 is a perspective view of the looper. Figs. 4 and5 exhibit theneedle and looper at different stages of the operaion of making thestitch.

Similar letters of reference indicate corre` E is the needle-operatingshaft, and F the,

looper-operating shaft, arranged parallel with each other in horizontal`positions, the latter in bearings underthe bed-plate and the formerinbearingsin the stationary arm. These shafts arefurnished withspur-gears G H,of the same "size, gearing with a spur-gear,1, secured tothe drivingwheel or pulley J, and are thus caused to he driven atuniform velocities. The shaft E also carries the feed-cam K, which actsupon the feed-lever L, the feed represented heing what is known as a topfeed/and the feeding-foot L constituting also the presser.

M is the looper, made in the form of a pointed hook, nearly tlat at thepoint and for some distance therefrom, and with a shoulder, a, on theside next which the needle n works to spread the loop, the lower pa'rtof the shoulder being rounded oft' in such manner as topermit :it topass freely into the loop. The said looper is pivoted by a screw-pin, b,to the. face of a.

. plate, N, which is arranged to oscillate in bracket. The looper willbe understood to have a. double or compound oscillating movement-viz.,the movement upon the pin b and the movement with the plate N upon thepin c.

VThe oscillating movement of the plate N is produced by a cranlnf, onthe shalt F, working in a slot, j", in the said plate. The oscillatingmovement of the looper upon the pin b is produced by the oscillatingmovement of the plate N, owing to the looper being connected by abridle-rod, g, with a fixed pin, a. This pin li is secured in arm O,cast with or otherwise secured to a cylindrical socket, l?, which isfitted to a hole provided for it in the stand A, and which is secured bymeans of a bindingscrew, i, screwing through the front of the stand. Thepin @,upon which theplate N oscillates, isscrewed into the center ot'the socket P, and hence when the binding-screw iis unscrewed` to permitthe socket Pto be turned the pin It is adjustable in an arc concentricwith the axis of the pin c, which permits it (the pin h) to he broughtnearer to or farther from the needle, by which means the looper isadjusted to work farther or not so far in to the loop.

Q is the thread-spool, arranged upon a horizontal pin,j, carried by anarm, D', secured to the top of the needle-bar. The said spool is Afirmlyheld between two cones, k l, tted to the pinj by means of a double nut,m, fitted to a screw-thread on the said pin, a spiral spring, n, beingcoiled round the said pin between the said nut and the cone la, and thesaid spring and nut holding the base ofthe cone l in contact with thearm Dl with the requisite force to cause friction enough between them toproduce a desirable tension on the thread.

1t is a lever attached by a fulcrum-fimp, to the arm, D', and q is aroller attached to one side ot' the stationary arm B. This lever androller `constitute my improved clamping device. The lever is so arrangedthat the point r of its shorter arm may be brought to'bear against anarrow cylindrical surface, l', provided around the base ot' the cone l,and its weight is so disposed by the coiled form of the upper part' ofits longer arm as to tend'to keep the point r ont of contact with thesurface Z of the cone l, and to keep its .longer arm in coutact with theroller g. The edge ofthe longer arm, which is toward the roller, has ashort inclination, s, (see. Fig. 1,) which in the downward movement ofthe lever with the needlebar comes into contact with the rollerq just asthe looper is about passing out of and liberating the loop. The leverduring the greater portion of the movement of the needle does not .bearon the cone l; but when in the downward up the loop so near the cloththat the louper cannot interfere with it in its advance to form thenextloop. Theloopisnot,however,drawn up tight by this operation, but istightened by the next upward movement ofthe needle.

The operation of the looper is illustrated b Figs. 1,4, and 5,. Theneedle and looper movements are so adjusted that the looper-plate Ncommences to move in the direction of the arrow shown upon it in Fig.l--that is to say, in a direction to carry the looper into the loop atthe same time as the needle commencesis descentand that the said platecommences to move back again at the same time as the needle commences torise. During the iirst-mentioned movement of the plate the looperiscaused by the bridle-rod g to turn over in the direction of the arrowshown near it in the above-mentioned figure, and during the returnmovement of the plate the looper turns back again. In that figure theneedle is descending and the looper just passinginto theloop. FigA'showsthe position toWhich the looper has moved after theneedle has completedits descent and made about half of its upward movement. In thiscondition ofthe needle and looper the loop, which is shown in Fig, l ashaving been drawn nearly up to the cloth, has been drawn up tightagainst the cloth; andA Fig. 5 shows the relative positions of theneedle and looper at the time when, during the descent ot' the needle,the inclinations on the lever R is just passing the roller q, the loopcrheilig j ust passing out ot the loopthrongh which the needle isdescending.

What I claim as my invention, and desire to Secure by Letters Patent, is

1. Securing the lpin c, ou which the looperplate N oscillates, and thefixed pin h, to which the bridle-rod g is attached, to asocket, P, whichis adjustable, as and for the purpose herein specified.

2. The bracket d, constructed with a flat inner face and applied incombination with the plate N, the looper-pin l), and the looper M,substantially as and for the purpose herein specitied.

CHA'S. RAYMOND.

Witnesses:

W. H. RAYMOND, v HENRY L. FRANKLIN.

